Electric attachment-plug.



. C. ZEIGLER.

ELECTRIC ATTACHMENT PLUG..

APPLICATION FILED 0CT.20. I917- Patented Mar. 25,1919.-

awua-mtoz Carl Zefyier;

MW m M m.

UNITED srArrEs PATENT only-o ELECTRIC ATTACHMENT-PLUG.

the invention is to provide improved means.

' for attaching and detaching the plug to the socket without turning theplug and thus avoiding twisting of the wires.

Another object of the invention is to provide a pair of movable membersor prongs within the plug with means for projecting their ends therefromto engage the screw threads in the socket to hold the plug therein.

Another object of the invention is to provide a device of this characterwhich is simple and durable in construction, reliable and efficient inoperation and one which can be manufactured and placed upon the marketata minimum cost.

The invention also consists in certain other features of constructionand in the combination and arrangement of the several parts, to behereinafter fully described, illustrated in the accompanying drawingsand specifically pointed out in the appended claim.

In describing my invention in detail, reference will be had to theaccompanying drawings wherein like characters denote like orcorresponding parts throughout the several views, and in which Figure 1is a longitudinal section of the plug made in accordance with myinvention.

Fig. 2 is a view of the other half of the plug.

. Fig; 3 is a perspective view of the operating parts removed from theplug.

In: these views 1 represents the plug which is made of any suitableinsulating material, such as porcelain or the like. I prefer to form.this plug of two sections which are removably secured together by thebolt 2. though if desired the two parts Specification of Letters Patent.k Application filed October 20, 1917. Serial No. 197,651. r

lower end of each, I

groove 6 to which the wires=leadingzto the lamp pass. The section'.7-.--whichcontains the chamber 4 carriesthetoperating rmecha havingits lower part bentinto substantially U shape and the upper part of theU being extended and bent at right angles to lie vertically in thegroove 5 and having its extreme end bent again at right angles to extend across said groove. This extreme end and the adjacent end of theupper member of the U are provided with alining openings to receive theL-shaped rod 9. The horizontal part of this rod extends parallel withthe limbs of the U-member and the connecting member of the U is cutaway'to permit the rod to have sliding movement thereagainst andadjacent its upper end said member is provided with a slot 10 to receivsaid rod, said rod being forced into the slot by a spring 11 connectedwith the lower limb of the U. This spring also holds the rod in verticalengagement with the vertical part of the U. A slot 12 extends throughthe wall of the plug to receive the-end of the horizontal part of therod 9. and a button 13 of insulating material is secured to the perendof the rod 9 has secured thereon an angle iron 14c to which arepivoted'the prongs 15. As will be seen the prongs lie horizontally inthe recesses 3 and due to the inclined bottoms of said recesses when theL-shaped rod is lowered said prongs will lie entirely within therecesses but when said rod is pushed upwardly the prongs will beprojected from the recesses. The lower limb of the U is provided with ascrew 16 to receive the wire 17 leading to the lamp and the other wire18 is connected'with a contact 19 which is connected with the centralcontact 20 by a wire 21 which lies in a groove 22 in the section 7 ofthe plug.

It will thus be seen that when the button is given sliding movementupwardly against the wall of the plug it will move the L- shaped rodvertically to project the ends of the prongs from the plug and" theseprongs will engage the grooves of the ordinary socket and thus retainthe plug in position i in the socket. As the rod reaches the end of itstravel the spring 11 will force it into the slot 10 and thus hold theparts in engaging position. 'When it is desired to re move the plug fromthe socket the button is 'nism which comprises a- .-f; rame 1'8o'f'inetalk'.

given a slight side-Wise movement to move the rod from the slot and saidbutton is moved downwardly to Withdraw the prongs. In this Way the plugmay be easily and quickly attached and detached from the socket withoutturning the same, as in the case'of a screw threaded plug, and thusavoiding twisting of the WIIBS;

It is thought from the foregomg description that the advantages andnovel features having a recess therein adapted to receive the red at theend of-itsj-upward movement,

What I claim is p 4 I A plug of the class described having a chambertherein, transverse recesses in its upper end, a frame-work within thechainher, an L-shaped rod slidably mounted within the rame-Work andhaving one end extending beyond the walls of the plug, a sliding buttonon said end, said frame-Work a spring for forcing said rod into the.recess, and-a'pair of prongs pivoted to the upper end of the rod andlying. in the transverse recesses in the plug.

In testimony whereof I afiix my signature.

CARL ZEIGLER.

